用Activator.CreateInstance 实现广告位模块 ，插件式开发
一、定义接口
using System;
namespace VCShop.Advertisement
{
public interface IAdvertisement
{
string Author();
void CreateAdvertisement(string width, string height, string path, string guid, string queryarray);
string Description();
string GetQuery();
string Name();
string Url();
string Version();
}
}
二、实现调用模块方法
namespace VCShop.Advertisement
{
using System;
using VCShop.Common;
public class AdvertisementFactory
{
public static IAdvertisement GetInstance(string AdvertisementName)
{
try
{
return (IAdvertisement) Activator.CreateInstance(Type.GetType(string.Format("VCShop.Advertisement.{0}.Advertisement, VCShop.Advertisement.{0}", AdvertisementName), false, true));
}
catch
{
utils.ShowErrorPage("请检查BIN文件夹下是否有VCShop.Advertisement." + AdvertisementName + ".dll这个文件");
return null;
}
}
}
}
三、广告位实体
1.普通 图片+链接广告位
namespace VCShop.Advertisement.Simple
{
using System;
using System.IO;
using System.Text;
using VCShop.Advertisement;
public class Advertisement : IAdvertisement
{
public string Author()
{
return "Terry";
}
public void CreateAdvertisement(string width, string height, string path, string guid, string queryArray)
{
if (queryArray.IndexOf(",") == -1)
{
queryArray = queryArray + ",";
}
StringBuilder builder = new StringBuilder();
string[] strArray = queryArray.Split(new char[] { ',' });
if (strArray[1] != "")
{
builder.Append("document.write('<a href=\"" + strArray[1] + "\" title=\"" + strArray[2] + "\" target=\"_blank\"><img src=\"" + strArray[0] + "\" width=\"" + width + "\" height=\"" + height + "\" border=\"0\"></a>');");
}
else
{
builder.Append("document.write('<img src=\"" + strArray[0] + "\" width=\"" + width + "\" height=\"" + height + "\" border=\"0\">');");
}
File.WriteAllText(path + "/" + guid + ".js", builder.ToString());
}
public string Description()
{
return "正常的广告";
}
public string GetQuery()
{
return "1|";
}
public string Name()
{
return "普通广告";
}
public string Url()
{
return "http://www.***.com.cn";
}
public string Version()
{
return "V1.0";
}
}
}
2. FALSH动态变换广告位
namespace VCShop.Advertisement.Flash
{
using System;
using System.IO;
using System.Text;
using VCShop.Advertisement;
public class Advertisement : IAdvertisement
{
public string Author()
{
return "Terry";
}
public void CreateAdvertisement(string width, string height, string path, string guid, string queryArray)
{
if (queryArray == "")
{
File.WriteAllText(path + "/" + guid + ".js", "");
}
else
{
if (queryArray.IndexOf(",") == -1)
{
queryArray = queryArray + ",,,,,,,,,,,,,,,,,";
}
StringBuilder builder = new StringBuilder();
builder.Append("var swf_width=" + width + ";");
builder.Append("var swf_height=" + height + ";");
builder.Append("var swf_config=\"|4|||0xFFFFFF|0xFF6600||4|3|1|_blank\";");
builder.Append("document.write('<object classid=\"clsid:d27cdb6e-ae6d-11cf-96b8-444553540000\" codebase=\"http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0\" width=\"'+ swf_width +'\" height=\"'+ swf_height +'\">');");
builder.Append("document.write('<param name=\"movie\" value=\"Lib/flash/bcastr.swf?bcastr_xml_url=show/" + guid + ".xml \">');");
builder.Append("document.write('<param name=\"quality\" value=\"high\">');");
builder.Append("document.write('<param name=\"menu\" value=\"false\">');");
builder.Append("document.write('<param name=\"wmode\" value=\"opaque\">');");
builder.Append("document.write('<param name=\"FlashVars\" value=\"bcastr_config='+swf_config+'\">');");
builder.Append("document.write('<embed src=\"Lib/flash/bcastr.swf?bcastr_xml_url=show/" + guid + ".xml\" FlashVars=\"bcastr_config='+swf_config+'\" wmode=\"opaque\" FlashVars=\"bcastr_config='+swf_config+'\" menu=\"false\" quality=\"high\" width=\"'+ swf_width +'\" height=\"'+ swf_height +'\" type=\"application/x-shockwave-flash\" pluginspage=\"http://www.macromedia.com/go/getflashplayer\" />');");
builder.Append("document.write('</object>');");
File.WriteAllText(path + "/" + guid + ".js", builder.ToString());
string[] strArray = queryArray.Split(new char[] { ',' });
builder = new StringBuilder();
builder.Append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
builder.Append("<bcaster>");
for (int i = 0; i < 6; i++)
{
if (strArray[i * 3].ToString() != "")
{
builder.Append("<item item_url=\"" + strArray[i * 3] + "\" link=\"" + strArray[(i * 3) + 1] + "\" />");
}
}
builder.Append("</bcaster>");
File.WriteAllText(path + "/" + guid + ".xml", builder.ToString());
}
}
public string Description()
{
return "FLASH轮换广告";
}
public string GetQuery()
{
return "6|";
}
public string Name()
{
return "FLASH轮换广告";
}
public string Url()
{
return "http://www.021web.com.cn";
}
public string Version()
{
return "V1.0";
}
}
}
三、调用广告位模块
AdvertisementFactory.GetInstance(str2).CreateAdvertisement(this.txtWidth.Text, this.txtHeight.Text, base.Server.MapPath("../template/" + this.path + "/Show"), mark, info);